单词 | parallelogram of velocities |
释义 | > as lemmasparallelogram of velocities b. parallelogram of forces n. [compare French parallélogramme des forces (1759)] a parallelogram illustrating the theorem that if two forces acting at a point are represented in magnitude and direction by two sides of a parallelogram meeting at that point, their resultant is represented by the diagonal drawn from that point; (hence) the theorem itself. parallelogram of vectors n. an analogous parallelogram used for determining the resultant of any pair of vector quantities, such as velocities. hence parallelogram of velocities. ΘΚΠ the world > matter > physics > mechanics > force > [noun] > specific diagram parallelogram of forces1818 1818 Philos. Trans. (Royal Soc.) 108 269 Half the difference of the angles at the base of the parallelogram of forces. 1830 H. Kater & D. Lardner Treat. Mechanics v. 50 To verify experimentally the theorem of the parallelogram of forces is not difficult. 1876 Analyst 3 186 It can easily be proved, by the well known principle of the parallelogram of velocities and forces, that every planetary body must be accelerated in its orbit. 1914 Science 26 June 940/2 Vector analysis may be called an algebra that rests on certain (arbitrary) assumptions, and the ‘parallelogram of vectors’ is one of these fundamental assumptions. 1947 T. J. Reynolds & E. Kent Struct. Steelwork (ed. 8) iv. 60 The two loads, ‘direct’ and that due to the turning moment, for any given rivet, are combined by the parallelogram of forces. 1971 Stud. in Renaissance 18 71 Important theoretical principles of motion, such as those of virtual velocities and the parallelogram of velocities. 1983 Proc. Royal Soc. A. 387 67 Hi may be decomposed (by a parallelogram of vectors) into two components, one directed along x3 and the other along the direction of the vector ωi. 1991 Amer. Econ. Rev. 81 316/2 Using the parallelogram of forces to find the interior solution site..produces a diagram of a pyramid. < as lemmas |
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